tessera-ctl/.planning/phases/03-module-system-domaincheck/03-02-SUMMARY.md

phase, plan, subsystem, tags, dependency_graph, tech_stack, key_files, key_decisions, patterns_established, requirements_completed, duration, completed

phase	plan	subsystem	tags	dependency_graph	tech_stack	key_files	key_decisions	patterns_established	requirements_completed	duration	completed
03-module-system-domaincheck	02	domaincheck	dns nestjs next-intl react tailwind module-system	requires provides affects module-registry-service module-guard prisma-service tenant-middleware jwt-auth-guard domaincheck-service domaincheck-controller domaincheck-module domaincheck-frontend-page domaincheck-seed module-marketplace sidebar-module-links	added patterns node:dns/promises module-seed-on-init dns-availability-check module-page-pattern	created modified apps/api/src/domaincheck/domaincheck.module.ts apps/api/src/domaincheck/domaincheck.service.ts apps/api/src/domaincheck/domaincheck.controller.ts apps/api/src/domaincheck/dto/check-domain.dto.ts apps/api/src/domaincheck/domaincheck.seed.ts apps/web/src/app/(portal)/modules/domaincheck/page.tsx apps/web/src/app/(portal)/modules/domaincheck/actions.ts apps/web/src/app/(portal)/modules/domaincheck/components/DomainInput.tsx apps/web/src/app/(portal)/modules/domaincheck/components/ResultList.tsx apps/api/src/app.module.ts apps/web/src/messages/de.json apps/web/src/messages/en.json	Used node:dns/promises with Promise.allSettled for parallel non-blocking lookups DNS timeout and error handling defaults to 'registered' as safe assumption Module self-seeds via OnModuleInit lifecycle hook for zero-config startup Frontend uses client-side fetch (not server action) for domain checks to keep interactive UX	Module seed pattern: OnModuleInit calls seedModule() for self-registration in registry Module page pattern: (portal)/modules/{slug}/page.tsx with actions.ts for API calls Result badge pattern: green/red pills with dark mode variants for status display	DCHK-01 DCHK-02 DCHK-03	7min	2026-06-19

Phase 03 Plan 02: Domaincheck Module Summary

End-to-end domain availability checker using DNS resolution across TLD variants with color-coded results in the portal UI

Performance

• Duration: 7 min
• Started: 2026-06-19T11:21:06Z
• Completed: 2026-06-19T11:28:12Z
• Tasks: 2
• Files modified: 12

Accomplishments

• DomaincheckService checks domain availability via node:dns/promises with 5s timeout per lookup and Promise.allSettled for parallel execution
• POST /modules/domaincheck/check endpoint protected by UseModule guard, validates input with regex (T-03-05) and limits TLDs to 10 (T-03-06)
• Frontend page at /modules/domaincheck with input form, loading state, and green/red status badges for results
• Module self-seeds into registry on application startup via OnModuleInit, creating the domaincheck record automatically

Task Commits

Each task was committed atomically:

1. Task 1: Domaincheck Backend - DNS Service + API Endpoint + Module Seed - 2e0a4dd (feat)
2. Task 2: Domaincheck Frontend - Input Form + Results Display - 1d9fd22 (feat)

Files Created/Modified

• apps/api/src/domaincheck/dto/check-domain.dto.ts - DTO with regex validation and TLD array limit
• apps/api/src/domaincheck/domaincheck.service.ts - DNS-based domain availability checking service
• apps/api/src/domaincheck/domaincheck.controller.ts - POST /modules/domaincheck/check endpoint
• apps/api/src/domaincheck/domaincheck.module.ts - NestJS module with OnModuleInit seed
• apps/api/src/domaincheck/domaincheck.seed.ts - Seed function for module registry
• apps/api/src/app.module.ts - Added DomaincheckModule import
• apps/web/src/app/(portal)/modules/domaincheck/page.tsx - Module page with input and results
• apps/web/src/app/(portal)/modules/domaincheck/actions.ts - Client-side API call function
• apps/web/src/app/(portal)/modules/domaincheck/components/DomainInput.tsx - Domain input form component
• apps/web/src/app/(portal)/modules/domaincheck/components/ResultList.tsx - Color-coded results list
• apps/web/src/messages/de.json - Added domaincheck i18n keys (German)
• apps/web/src/messages/en.json - Added domaincheck i18n keys (English)

Decisions Made

• Used node:dns/promises with dns.resolve() for availability detection -- standard Node.js API, no external dependency needed
• Safe default: DNS errors other than ENOTFOUND/ENODATA return "registered" to avoid false availability claims
• Module seeds itself via OnModuleInit lifecycle hook rather than a separate migration or seed script -- zero-config startup
• Frontend uses client-side fetch with credentials: 'include' (consistent with existing portal pages) rather than server actions for domain checks to maintain interactive UX

Threat Mitigations Applied

Threat ID	Mitigation	Implementation
T-03-05	Regex validation on domain input	check-domain.dto.ts: alphanumeric + hyphens, max 63 chars, no dots
T-03-06	5s timeout per lookup, max 10 TLDs	domaincheck.service.ts + check-domain.dto.ts ArrayMaxSize(10)
T-03-07	Accepted - domain availability is public	No additional mitigation needed
T-03-08	UseModule('domaincheck') guard	domaincheck.controller.ts: class-level decorator with JwtAuthGuard

Deviations from Plan

None - plan executed exactly as written.

Issues Encountered

None.

User Setup Required

None - no external service configuration required.

Next Phase Readiness

• Domaincheck module is fully functional end-to-end
• Module page pattern established for future modules under (portal)/modules/{slug}/
• Module seed pattern established for self-registration on startup
• Sidebar integration for module navigation may be needed in a future plan

Self-Check: PASSED

All 9 created files verified on disk. Both task commits (2e0a4dd, 1d9fd22) verified in git log.

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Phase: 03-module-system-domaincheck Completed: 2026-06-19